What are adjacent angles and linear pair angles and what is the difference between them?

• Two angles are adjacent when they have a common side and a common vertex (corner point). 

Example:

• Here angles A and B are adjacent.

• The angles are said to be linear if they are adjacent to each other after the intersection of the two lines.
• The sum of angles of a linear pair is always equal to 180°.
• Such angles are also known as supplementary angles. One angle is called the supplement of the other.

Example: